Gets the content of a FlowFile and puts it to a distributed map cache, using a cache key computed from FlowFile attributes. If the cache already contains the entry and the cache update strategy is 'keep original' the entry is not replaced.'
map, cache, put, distributed
In the list below, the names of required properties appear in bold. Any other properties (not in bold) are considered optional. The table also indicates any default values, and whether a property supports the NiFi Expression Language.
| Name | Default Value | Allowable Values | Description |
|---|---|---|---|
| Cache Entry Identifier | A FlowFile attribute, or the results of an Attribute Expression Language statement, which will be evaluated against a FlowFile in order to determine the cache key Supports Expression Language: true (will be evaluated using flow file attributes and variable registry) | ||
| Distributed Cache Service | Controller Service API: DistributedMapCacheClient Implementations: HBase_2_ClientMapCacheService CassandraDistributedMapCache HBase_1_1_2_ClientMapCacheService DistributedMapCacheClientService CouchbaseMapCacheClient HazelcastMapCacheClient RedisDistributedMapCacheClientService | The Controller Service that is used to cache flow files | |
| Cache update strategy | replace |
| Determines how the cache is updated if the cache already contains the entry |
| Max cache entry size | 1 MB | The maximum amount of data to put into cache |
| Name | Description |
|---|---|
| success | Any FlowFile that is successfully inserted into cache will be routed to this relationship |
| failure | Any FlowFile that cannot be inserted into the cache will be routed to this relationship |
| Name | Description |
|---|---|
| cached | All FlowFiles will have an attribute 'cached'. The value of this attribute is true, is the FlowFile is cached, otherwise false. |
DistributedMapCacheClientService, DistributedMapCacheServer, FetchDistributedMapCache
